Improvement in springs for wagons



D. A. BOYLE.

Springs for Wagons.

Patented Oct. 21,1873.

AM mom-umamM/c E0. M X/ossoauzs moms) UNITED STATES PATENT QFFIGE.

. DAVID A. BOYLE, or ATTIGA, OHIO.

IMPROVEMENT lN SPRINGS-FOR WAGONS.

Specification forming part of Letters Patent No. 143,744, dated October 21, 1873; application filed June 18, 1873.

ing is a full, clear, and exact description, reference being had to the accompanying drawings and the letters of reference marked thereon.

The nature of my invention consists in the construction and arrangement of a spring-seat for wagons, as more fully hereinafter set forth.

Figure 1 represents a front view of my improved seat, and shows the general arrangement of its parts. Fig. 2 is a bottom view of the same.

The seat A may be constructed in any desired form. On the under side, in the center, near the front and back edges, I attach two brackets or eyebolts, B B, either by flanges and screws, or by screwing them directly into the seatA. Through thesebrackets or eyebolts B B, and having free play therein, is a single rolling rod, 0. The ends of rod 0 pass through and are fastened to the plates (1 d, which latter form the means of compensation in the elevation and .the depression of the seatA. Through each end of the plates d d and the upper end of the rods D D are drilled holes, for the pur pose of fastening them together either by bolts or rivets, as may be desired, and they thus form a common hinge-joint. The other end of the rods D D are bent in the form of a hook, for the purpose of hanging on the edge of the wagon-box, and are firmly fastened to the spring-board F by bolts E E or staples. The spiral springs G G are fastened at each end, respectively, to the seat A and the springboard F, as shown in Fig. 2.

It will be observed that the construction of the rods D D is such .that when theseat A is at the highest elevation it is in position to receive an impulse from right to left at the top end, and can under no circumstances assume any other position. The length of the plates (1 d varies between three and five inches, which allows. sufficient oscillation to permit the seat to fall the required distancewithout pressing out the sides of the wagon-box.

The operation of this device may be thus described: When the seat is depressed the advance of the right-hand rod in Fig. 1 causes the upper end of plate d to pass over from right to left, in which movementthe left-hand rod reciprocates until the spiral springs G Gr close.

The advantage of this seat over others heretofore patented is, that it can have no lateral or end play by reason of the center of seat A being held rigidly in place by the roller-rod O, which must remain at auniform distance from the hooks resting on the edges of the wagonbox."

I am aware that many spring-seats have been patented having the spiral springs G and spring-board F, and with rods to slide in recesses; also, with compensating links acting independently of each other; and all those devices I expressly disclaim.

What I do claim, and wish to secure by Let-- ters Patent, is-

In combination with the seat A, spiral springs G, and springboard F, the rods D D, plates d d, roller-rod O, and brackets B B, all constructed as described, and for the purpose set forth.

In witness that I claim the foregoing I hereunto set my hand this 13th day of June, A. l). 187 3.

DAVID A. BOYLE.

In presence of JOHN GwYNN,

ALEXANDER PEw. 

